Multiple position locking slide



Dec. 27, 1955 s. l. GUssAcK MULTIPLE POSITION LOCKING SLIDE Filed Aug. 30, 1954 INVENTOR SEYMOUR I. GuzssAcK BY i \ ATTORNEY )bite States Paten-r MULTPLE PSHIN LCKNG SLIDE Seymour I. Gussack, Flushing, N. Y., assigner to Grant Puiley Lf Hardware Corporation, Finshing, N. Y., a corporation Application August 3i), 1954, Serial Nn. 453,629

-1 Claim. V(Ci. S12-333) This invention relates to drawer slides.

Broadly, it is an object of the invention to provide slides which permit locking of the drawer or chassis when the slide is in fully closed position, in the fully extended position, and in any desired intermediate positions.

More particularly, it is an object of the invention to provide slides for drawers or chassis which will permit locking of the drawer or chassis in the fully extended position even when the drawer or chassis has completely passed the cabinet and overtraveled the same.

For a fuller understanding of the nature and objects of the invention reference is had to the following detailed description in connection with the accompanying drawings, in which:

Fig. l is a side elevational view of one of a pair of slides shown in open or extended position; the other of the pair of slides need not have the locking attachments, the same being optional.

Fig. 2 is an end view of the slide shown in Fig. l.

Fig. 3 is a top View and Fig. 4 is a side view of the rear lock assembly of the slide shown in Fig. 1; and

Fig. 5 is a perspective view of a cam block as seen from the side opposite to that shown in Fig. l.

Referring to the drawings, numeral represents al slide (one of a pair) comprising an outer channel 11, an intermediate channel 12, a center track 13 and integral plate 14 and ball spacers 15 with balls 16 between the center track 13 and intermediate channel 12 and the intermediate channel 12 and the outer channel 11. A chassis or drawer 17 is attached to the outer channel 11 by screws or any other well-known means and the plate 14 is attached to the cabinet wall 18.

The upper leg or flange of the outer channel 11 has attached thereto at its outer end a front release assembly comprising brackets 19, 20, having apertures at the upper end through which a rod release member 21 passes. The

outer end of member 21 has a finger piece or button 22 and the opposite end is attached to a T-shaped lock arm 23 by roll pin 24. The lower central part of the lock arm 23 is pivotally attached by roll pin 26 to bracket 2S which is attached to the upper leg or ange of the outer channel 11. The forward end of lock arm 23 has pivotally attached to it a plunger 27 by roll pin 28. Beneath the opposite or rearward end of lock arm 23 there is a spring 29 providing7 an upward pressure upon the rear end of the lock arm 23. The upper ange of the outer channel also has a cam block 30 attached thereto having opposed pitched upper surfaces 31 for the purpose as will hereinafter be described.

The center track 13 has a rear lock assembly 32 pivotally attached thereto and comprises an arm cam 33 and an arm latch 34 rigidly fastened together with pin 35. The upper or outer end of arm cam 33 has an outwardly facing right angle pin 36 projecting therefrom. A spring 37 is attached to the center track 13 by stud 38 causing the arm latch 34 to engage stud 39 which projects inwardly from the intermediate track 12. Several such studs, like 39, such as 40, could be placed along the interlll mediate track 12 for engagement with the arm latch 34 for locking the drawer or chassis along the length of the slide.

The front release assembly is operated by means'of rod releasemember'rZl which actuates plunger 27 allowing it to lock the intermediate channel 12 to the outer channel 11 by either falling in front of the intermediate channel 12 (as shown in Fig. l) or into a notch 41 or 42 in the intermediate channel '12. ln the fully extended position, the ball spacers preventfurther forward travel, therefore, the plunger 27 can lock the outer channel 11 to the intermediate channel 12 by falling in front of the inter mediate channel 12, as shown in Fig. l. The intermediate channel 12 is locked to the center track 13 by means of the rear lock assembly comprising arm cam 33 and arm iock 34 and studs 39, 40. The spring 37 causes the arm latch 34 to engage studs 39, 40. One pin (39, 40) is required for each locking position.

When unlocking the slide 10 to close the drawer, the rod release member 21 lifts the plunger 27 which releases the outer channel 11 from the intermediate channel 12 and permits it to travel in relation to the center track 13, being pushed by the operator in the direction desired. The cam block 3l) (placed in proper position) cams up the rear lock assembly 32 by means of the pin 36 riding up one of the pitched or angular surfaces 31 (the rear one), causing the rear lock assembly 32 to rotate clockwise, and descending the opposite angular surface 31 (the front one) thus lifting and disengaging the arm latch 34 from the stud 39 allowing the intermediate channel 12 to be released with respect to the center track 13. All members are released and the drawer or chassis is allowed to travel to the next locking position. Before the next locking position is reached, cam block allows pin 36 to drop. Spring 37 forces the rear locking assembly 32 to rotate counter-clockwise, thus dropping arm latch 34 in preparation for the next locking position. Arm latch 34 hits the second stud 40 and is cammed up by the stud until the stud drops into the notch in the arm latch 34. After this operation is completed,'the center track 13 is locked to the intermediate channel 12. The outer channel 11 keeps moving (pushed by the operator) until plunger 27 hits the second notch 42 and then drops into notch 42, actuated by spring 29 and thus locks the outer channel 11 to the intermediate channel 12. The slide is now locked. In closing the slide the outer channel 11, by means of the screw 43, collects the intermediate channel 12. Of course, if more than two locking positions are desired then more than one cam block is used thus picking up the arm cam 33 again and unlocking it for the next position to release the intermediate channel 12 from the outer channel 11.

ln the fully closed position, notch 44 of the intermediate channel contacts pin 45 of the center track 13 to end the inward movement of the intermediate channel.

lt is obvious that various changes and modilications may be made in the details of construction and arrangement of parts without departing from the general spirit of the invention.

I claim:

A slide comprising an outer channel, an intermediate channel, a center track and ball spacers between said center track and said intermediate channel and said intermediate channel and said outer channel, a front lock asv sembly attached to said outer channel, said front lock asmediate channel having notches for receiving said plunger for locking said outer channel to said intermediate channel, studs on said intermediate channel, a rear lock assembly attached to said center track, said rear lock assembly comprising an arm cam Vand an arm latch, said arm latch having a notch, said arm cam and arm latch rigidly fastened together, an inwardly directed pin adjacent the end of said arm cam and projecting at a right angle thereto, said arm latch adapted to progressively hook onto said studs of said intermediate channel for locking said intermediate channel to said outer channel in one or more locking positions, a spring attached to said center track for urging said rear lock assembly to rotate counter-clockwise, one or more cams attached to said outer channel for contacting said pin of said arm cam for causing said rear lock assembly to rotate clockwise to lift said arm latch off said studs of said intermediate channel to release said intermediate channel from said center track, whereby by pressing said rod release member said plunger will dsengage said notches of said intermediate channel to release said outer channel from said intermediate channel and when said cams contact said pin of said arm cam of said rear lock assembly said intermediate channel will be released from said center track.

Gleason Mar. 3, 1953 Gussack Oct. 13, 1953 

